package com.xueyi.aixihu.utils;

import cn.hutool.core.date.DateUtil;

import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Calendar;
import java.util.Date;

public class MD5Utils {


    public static String monthLastDayTime(String month) {

        return monthLastDayTime(DateUtil.parse(month, "yyyy-MM"));
    }

    public static String monthLastDayTime(Date month) {

        Calendar instance = Calendar.getInstance();
        instance.setTime(month);
        instance.set(Calendar.DATE, 1);
        instance.roll(Calendar.DATE, -1);
        int maxDate = instance.get(Calendar.DATE);
        return DateUtil.format(month, "yyyy-MM") + "-" + maxDate + " 23:59:59";
    }

    public static void main(String[] args) {
        System.out.println(monthLastDayTime(new Date()));
    }

    /**
     * 使用md5的算法进行加密
     */
    public static String md5(String plainText) {
        byte[] secretBytes = null;
        try {
            secretBytes = MessageDigest.getInstance("md5").digest(plainText.getBytes());
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException("没有md5这个算法！");
        }
        String md5code = new BigInteger(1, secretBytes).toString(16);// 16进制数字
        // 如果生成数字未满32位，需要前面补0
        for (int i = 0; i < 32 - md5code.length(); i++) {
            md5code = "0" + md5code;
        }
        return md5code;
    }
}
